The traditional diet of Greece and cancer.

[heblaj01]

Julierene,
You appear to have difficulties in digesting fish oil pills. Setting aside an allergy to seafood, it is possible you need taking digestive enzymes at the same time as the oil pills, in particular the lipase enzyme.
Lipase & other digestive enzymes are also indicated for some people with poor bile &/or pancreatic secretion or whose gallbladder has been resected or is not functioning because it is filled with stones. I am in this latter category & I take enzyme supplements with oil pills.
It is also preferable to take oil pills at the end of meals.

NOTE:
A simple check to find out if someone has problems in digesting fats is the color of stools: yellowish is indicative of poor digestion.